A transformer having efficiency of 90 % is working on 200 V and 3 k W power supply. If the current in the…

A transformer having efficiency of 90% is working on 200 V and 3 kW power supply. If the current in the secondary coil is 6 A the voltage across the secondary coil and the current in the primary coil respectively are:
  1. 300 V, 15 A
  2. 450 V, 15 A
  3. 450 V, 13.5 A
  4. 600 V, 15 A

Solution

Current in primary coil =PV=3000200=15A
Pout=η% of Pin
V2i2=90100×3000
V26=2700
V2=450 volt

Asked in: NEET 2014

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